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The Thule High Arctic Atmospheric Observatory (THAAO), Greenland

The Thule High Arctic Atmospheric Observatory (THAAO) at Thule Air Base (76.5°N, 68.8°W) is located on South Mountain, at a 20-minute drive from main base, and is superintended by the Danish Meteorological Institute (DMI). Various ground-based instruments installed in the observatory are part of the international Network for Detection of Atmospheric Composition Change (NDACC, http://www.ndsc.ncep.noaa.gov). The Italian effort at Thule started in 1990 and is based on a collaboration between personnel of Univ. of Rome “La Sapienza”, ENEA and INGV, which together installed, maintained and operate a number of ground-based instruments devoted to the observation of the Arctic environment.